This patches makes opengl an optional component.

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
---
Index: mesa3d-demos-8.1.0/configure.ac
===================================================================
--- mesa3d-demos-8.1.0.orig/configure.ac
+++ mesa3d-demos-8.1.0/configure.ac
@@ -51,6 +51,14 @@
   ACLOCAL="aclocal -I/other/macro/dir" before running autoreconf.])])
 PKG_PROG_PKG_CONFIG()
 
+AC_ARG_ENABLE([gl],
+    [AS_HELP_STRING([--enable-gl],
+        [enable GL library @<:@default=no@:>@])],
+    [gl_enabled="$enableval"],
+    [gl_enabled=auto])
+
+if test "x$gl_enabled" != "xno"; then
+
 dnl Get the pkg-config definitions for libGL.  We include a fallback
 dnl path for GL implementation that don't provide a .pc file
 PKG_CHECK_MODULES(GL, [gl], [], [
@@ -113,6 +121,8 @@
 DEMO_CFLAGS="$DEMO_CFLAGS $GLU_CFLAGS"
 DEMO_LIBS="$DEMO_LIBS $GLU_LIBS"
 
+fi
+
 AC_ARG_ENABLE([egl],
     [AS_HELP_STRING([--enable-egl],
         [enable EGL library @<:@default=auto@:>@])],
@@ -303,7 +313,7 @@
 AC_SUBST([WAYLAND_CFLAGS])
 AC_SUBST([WAYLAND_LIBS])
 
-
+AM_CONDITIONAL(HAVE_GL, test "x$gl_enabled" = "xyes")
 AM_CONDITIONAL(HAVE_EGL, test "x$egl_enabled" = "xyes")
 AM_CONDITIONAL(HAVE_GLESV1, test "x$glesv1_enabled" = "xyes")
 AM_CONDITIONAL(HAVE_GLESV2, test "x$glesv2_enabled" = "xyes")
Index: mesa3d-demos-8.1.0/src/egl/opengl/Makefile.am
===================================================================
--- mesa3d-demos-8.1.0.orig/src/egl/opengl/Makefile.am
+++ mesa3d-demos-8.1.0/src/egl/opengl/Makefile.am
@@ -50,12 +50,14 @@
 endif
 
 if HAVE_EGL
+if HAVE_GL
 noinst_PROGRAMS = \
 	eglinfo \
 	peglgears \
 	$(EGL_DRM_DEMOS) \
 	$(EGL_X11_DEMOS)
 endif
+endif
 
 egltri_x11_SOURCES = egltri.c
 eglgears_x11_SOURCES = eglgears.c
Index: mesa3d-demos-8.1.0/src/util/Makefile.am
===================================================================
--- mesa3d-demos-8.1.0.orig/src/util/Makefile.am
+++ mesa3d-demos-8.1.0/src/util/Makefile.am
@@ -27,7 +27,9 @@ AM_CFLAGS = \
 AM_LDFLAGS = \
 	$(DEMO_LIBS)
 
+if HAVE_GL
 noinst_LTLIBRARIES = libutil.la
+endif
 
 if HAVE_GLUT
 AM_CFLAGS += \